共查询到15条相似文献,搜索用时 93 毫秒
1.
引言我国地震系统数字化台网改造工作正在全面展开 ,不仅需要高质量的数字化地震观测仪器 ,提高观测质量 ;同样也需要一种适合遥测台工作特点的供电系统 ,提高遥测台地震观测仪器的连续运行率。在遥测台网的监测工作中 ,由于原有的电源不尽完善 ,不能完全适应遥测台的工作环境 ,造成地震信号断记的现象时有发生。一直是困扰遥测台网监测工作质量的一个难题。为此 ,我们研制了 LN-GDXT-1型多功能电源。LN-GDXT-1型多功能电源具有性能稳定 ,输入交流电压范围宽 ,停电时持续供电时间长 ,免维护等特点 ,是一种较为理想的遥测台供电系统。1… 相似文献
2.
3.
介绍一种基于GSM(全球移动通信系统)网络SMS(短信业务)的双路后备电源管理系统的原理及设计实现.它由一个无线GSM模块(WAVECOM公司的Q2403模块)和一个单片机(AT89S52)为核心的监控单元组成,监控单元利用AT指令通过串口和GSM模块进行通信.该系统借助GSM模块Q2403,使用户能够通过短信便捷地对双路后备电源进行参数设置和控制. 相似文献
4.
SS-Y伸缩仪在中国地壳形变观测中已安装使用多年,为了保证观测信噪比,伸缩仪基线长度一般在10~30 m之间,过长的基线导致仪器易受环境干扰的影响;同时,由于没有密封设计,长期使用会出现格值误差等问题。针对SS-Y伸缩仪所存在的不足,研制了一种新型短基线伸缩仪,仪器基线长度为1 m,采用具有较高精度的电容传感器进行位移测量,并设计了全新的整体密封结构,使仪器具备更好的抗干扰能力。线性度、灵敏度等参数测试及观测试验结果表明,该新型短基线伸缩仪具有良好的性能特性和观测信噪比,这为仪器的进一步优化打下了基础。 相似文献
5.
6.
介绍了前兆台网遥控供电仪的设计思路和设计技术,就该遥控仪可实现的功能进行了描述,给出了遥控仪的技术指标和应用图例。该遥控仪可以满足遥测台站供电控制的需要。 相似文献
7.
介绍了实现前兆数字化设备供电电源远程监控的方法,详细阐明了实现该方法的电路及软件修改步骤,展示了该方法在云南的使用情况. 相似文献
8.
9.
10.
A. Ya. Sidorin 《Seismic Instruments》2011,47(4):368-385
The main features of periodic changes in the parameters of seismic noise, seismicity and electric power consumption in industrial
networks are compared to verify the hypothesis on the technogenic influence of electric network load on seismic noise and
seismicity and to search for possible origins of the diurnal periodicity in seismic emission processes discovered in various
regions of the world. Sufficiently good similarity of the compared processes is revealed that does not contradict the hypothesis.
However, there are also some important discrepancies. An inverse phase pattern of interdiurnal distributions of weak and strong
Japanese earthquakes has been found, and various possible mechanisms of this phenomenon, which had been observed earlier in
certain other regions, are discussed. 相似文献
11.
为提高地震观测设备维护效率,基于CK6660数据采集卡和ZLAN5103串口服务器,采用C#语言编写上位机软件,设计远程电源监测及控制系统,通过在静乐地震台的实际应用,该系统达到预期效果。 相似文献
12.
上海测震、地球物理台站运行中,因电源系统和雷电而导致的故障占了较大比例。为提升台站运行质量而研发的隔离电源系统,可有效地将市电与台站设备间进行物理隔离,杜绝了雷击通过交流电供电途径的串入。该系统研制成功后,在上海测震台站试运行,其间发现了系统的一些缺陷,技术人员进行多次改进,提升了系统的整体性能。该系统已在多个测震、地球物理台站应用,取得了显著的防雷、防浪涌效果。 相似文献
13.
针对前兆系统的现状和需求,基于对前兆数据管理系统中的元数据进行分析,结合地震前兆系统元数据的多样性、分布性、约束性等特点,设计了前兆元数据管理系统. 相似文献
14.
15.
Population growth in urban areas is putting pressure on sewage treatment plants. The improper treatment of sewage entering the aquatic ecosystems causes deterioration of the water quality of the receiving water body. The effect of sewage effluent on the Sand River was assessed. Eight sampling sites were selected, site 1 and 2 were upstream of the sewage treatment plant along the urbanised area of Polokwane, whilst sites 3, 4, 5, 6, 7 and 8 were downstream. The physico-chemical parameters and coliform counts in the water samples were determined. The suitability of the water for irrigation was also determined. Hierarchical average linkage cluster analysis produced two clusters, grouping two sites above the sewage treatment works and six sites downstream of the sewage effluent discharge point. Principal component analysis (PCA) identified total nitrogen, total phosphorus, conductivity and salinity as the major factors contributing to the variability of the Sand River water quality. These factors are strongly associated with the downstream sites. Canonial correspondence analysis (CCA) indicated the macroinvertebrates, Chironomidae, Belastomatidae, Chaoborus and Hirudinea being strongly associated with nitrogen, phosphorus, conductivity and temperature. Escherichia coli levels in the Polokwane wastewater treatment works maturation ponds, could potentially lead to contamination of the Polokwane aquifer. The Sodium Adsorption Ratio was between 1.5 and 3.0 and residual sodium carbonate was below 1.24 Meq/l, indicating that the Sand River water is still suitable for irrigation. The total phosphorus concentrations fluctuated across the different site. Total nitrogen concentrations showed a gradual decrease downstream from the point of discharge. This shows that the river still has a good self-purification capacity. 相似文献